• Publications close

Barangan banana (Musa acuminata L.) is a plant that has the biggest contribution to national fruit production. The increasing demand for the banana requires the availability of seedlings, while conventional cultivation is unable to produce healthy, disease-free seedlings in a short time and large amount. In vitro culture is considered to be able to handle the constraints of the conventional seed supply. The purpose of this study was to determine the effect of foliar fertilizers on in vitro multiplication of barangan bananas. The method used was a single factor of Completely Randomized Design (CRD), the addition of leaf fertilizer consisting of five levels of media treatment, media MS (control), and 0.50 ml L-1 (p1); 0.75 ml L-1 (p2); 1.00 ml L-1 (p3); 1.25 ml L-1 (p4); 1.50 ml L-1 (p5) of leaf fertilizer media repeated five times. The data were analyzed with Analysis Variance then followed by Duncan Multiple Ranged Test of 5%. The results showed MS media still gave the best results compared to other leaf fertilizer media. Meanwhile, the leaf fertilizer media used in this study still gave good results on the initial time of buds appearance (p3 treatment), the number of shoots and the number of leaves in the p5 treatment, as well as the height of the plant in the p4 and p5 treatments. Therefore, the leaf fertilizer can be used to substitute MS media

The diversity of genetic material determines the success of cocoa production. improvement and breeding programs. Enrichment of genetic material for Bangka cocoa can be achieved through exploration and characterization of morphological features or characters of accessions, clones, and/or varieties. To determine the level of diversity of qualitative and quantitative traits. Morphological exploration and characterization was aimed at identifying the diversity of Bangka cocoa as an effort to increase the efficiency of utilization of local genetic material. The research used survey, and direct characterization (purposive sampling). Exploration to obtain a cocoa plant passport consists of accession number, accession name, location of origin, owner's name, age of plant, and land area. Characterization to obtain the identity of qualitative and quantitative characters from leaves, flowers, fruits, and seeds refers to “The Systematic Description of Cacao Clones. The results of the exploration-characterization obtained 29 accessions of cocoa from Bangka, which had very diverse morphological characters. Diversity is evidenced by wide phenotypic variability even though it has narrow genetic variability, and the similarity level of some accessions is quite low, namely <50%.

Produksi tanaman lada tidak sejalan dengan upaya ekstensifikasi dan intensifikasi pemerintah, hal ini disebabkan masih banyaknya infeksi penyakit pada tanaman lada bahkan cenderung bertambah baik dari jenis penyakit maupun intensitas infeksi penyakitnya. Informasi mengenai perkembangan penyakit tanaman lada di area centra produksi lada yang jarang diperbaharui. Penelitian ini dilakukan untuk mengamati dan menentukan kejadian dan keparahan penyakit tanaman lada menggunakan metode purposive samping. Hasil penelitian ditemukan 3 jenis penyakit yang menginfeksi tanaman lada di Kabupaten Bangka Selatan, yaitu penyakit kuning, busuk pangkal batang dan kerdil virus. Tingkat kejadian dan keparahan penyakit relatif lebih tinggi terjadi di Kecamatan Tukak Sadai. Kejadian penyakit kuning lada, penyakit busuk pangkal batang, dan penyakit virus berkisar 3,33-90,48 %; 43,70 %; dan 12,5-100 %, secara berturut-turut. Keparahan penyakit busuk pangkal batang mencapai 43,11 % dan penyakit virus berkisar 4,58-59,57 %. White pepper production is not in line with the government's extensification and intensification efforts, these are due to disease infection in the pepper plant that tends to increase. Information about disease progression of black pepper plants in production center areas is rarely updated. This research was conducted to observe and determine incidence and severity disease of the black pepper plantations by using the purposive sampling method. The results of the study found three types of disease that infected on black pepper plantations in the South Bangka Regency, namely yellow disease, stem rot disease, and viral disease. The incidence and severity disease are relatively higher in the Tukak Sadai District than others. The incidences of yellow disease, rot stem disease, and viral disease about 3,33 to 90,48 %; 0 to 43,70 %, and 12,5 to 100 %, respectively. The severity of rot stem disease until 43,11 %; and viral disease about 4,58 to 59,57 %.

Pemanfaatan tanah pasca penambangan batuan untuk budidaya tanaman jagung dapat dilakukan dengan memperbaiki kesuburan tanahnya dengan cara aplikasi bahan organic dan Bakteri Pelarut Fosfat. Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi bokhasi paitan dan Bakteri Pelarut Fosfat terhadap perbaikan kesuburan tanah pasca penambangan batuan, pertumbuhan, dan hasil tanaman jagung. Penelitian menggunakan rancangan acak kelompok pola faktorial. Faktor pertama konsentrasi BPF (0, 10, 20 ml tanaman-1) dan faktor kedua dosis bokhasi paitan (0,10,20, 30 t ha-1). Parameter yang daiamati adalah C-organik tanah, P-tersedia, luas daun, indeks panen, dan bobot jagung tanpa kelobot. Hasil penelitian menunjukkan inokulasi BPF meningkatkan C-organik dan P-tersedia, indeks panen dan bobot jagung tanpa kelobot. Aplikasi bokhasi paitan meningkatkan luas daun. Inokulasi BPF 20 ml tanaman-1 memperbaiki C-organik tanah dan P-tersedia serta hasil tanaman jagung yang ditanam pada tanah pasca penambangan batuan. Utilization postmine sandpits soil for maize cultivation can be done by improving soil fertility by applying organic matter and Phosphate Solubilizing Bacteria. This study aims to determine the effect of the application of bokashi paitan and Phosphate Solubilizing Bacteria on the improvement of soil fertility post mine sandpits soil, growth, and yield of maize. The study used a factorial randomized block design. The first factor was the concentration of PSB (0, 10, 20 ml plant-1) and the second factor was the dose of bokashi Tithonia diversifolia (0,10,20,30 t ha-1). The parameters observed were soil organic C, available P, RSR, leaf area, harvest index, and weight of corn without husks. The results showed that PSB inoculation increased C-organic and P-available, harvest index and weight of corn without husks. Application of bokashi paitan increases leaf area. PSB inoculation of 20 ml plant-1 improved soil C-organic and P-available as well as maize yields grown in post mine sandspits soil.

The Tungro disease is a significant issue that impedes rice production. It is spread by green leafhopper vectors carrying the RTBV and RTSV pathogens. The infection causes a decline in various components of rice yield and is categorized based on a scoring system ranging from 1 to 9. The objective of this study was to investigate the correlation between the scoring values and yield loss, as well as determine the production factor that had the greatest impact on yield loss for each score. The research was conducted at the IP2TP Tungro Disease Research Station between August and October 2020. A purposive sampling technique, which involved the direct observation of tungro-affected rice fields, was employed as the research method. A score was assigned to 5 clumps of plants for each case. Data analysis was performed using simple regression, correlation, and PCA. The findings indicate that with the exception of the empty grain parameter, which increased along with the scoring value, each increment in the Tungro score resulted in a decrease in the yield variables. The components of yield that declined in all scores as a result of Tungro infection included total grain weight, weight of 100 seeds, total grain count, and total grain content. Tungro merupakan penyakit penting yang menjadi faktor pembatas produksi padi. Penyakit tungro ditularkan oleh vektor wereng hijau pembawa RTBV dan RTSV. Infeksi tungro menyebabkan kehilangan komponen hasil padi dan dinyatakan dengan nilai skor yaitu 1,3,5,7 dan 9. Tujuan penelitian ini untuk menggambarkan korelasi antara nilai skor tungro dengan variabel produksi yang paling mempengaruhi kehilangan hasil pada setiap skoring. Penelitian dilaksanakan di IP2TP Loka Penelitian Penyakit Tungro pada bulan Agustus hingga Oktober 2020. Metode penelitian yang digunakan berupa purposive sampling yaitu pengambilan sampel dengan pengamatan langsung terhadap padi yang terinfeksi tungro. Masing-masing tanaman yang terserang tungro diskoring dan diambil sebanyak 5 rumpun tanaman. Data dianalisis menggunakan regresi sederhana, korelasi dan PCA. Hasil menunjukkan bahwa kecuali parameter gabah hampa akan naik seiring dengan meningkatnya nilai skor, setiap penambahan nilai skor tungro akan diikuti dengan berkurangnya nilai variabel komponen hasil. Komponen hasil yang paling menurun saat tanaman terinfeksi tungro di semua skoring yaitu berat gabah total, berat 100 biji, jumlah gabah total dan gabah isi.

The objective of the research to know the effect liquid sediment coastal and cow manure on the growth and yield of shallot on peat soil and to know the best dosage can be increased on the yield of shallot. Research conducted at the research field of Faculty of Agriculture, the University of Tanjungpura on April to June 2016, using a completely randomized design factorial with two factors and each treatment combination was replicated three times. The first factor was LLC concentration levels (0.3; 0.6; 0.9 L plant-1). The second factor was cattle manure dosages (25; 50; 75 g plant-1). The research showed that there was an interaction between liquid sediment coastal and cow manure significantly improved the number of tillers, number of bulbs, and fresh weight of shallot. However, there was an interaction between liquid sediment coastal and cow manure and also the effect each treatment not significantly to plant height of shallot. The treatment of liquid sediment coastal 0,6 L plant-1 and cow manure 75 g plant-1 can improve the yield of shallot on peat soil.

In oil palm, Ganoderma boninense causes stem rot disease, which is often difficult to control, and soil fertility status is related to the ecology of G. boninense as a soil-borne pathogen. Therefore, this study aims to evaluate the relationship between soil fertility and stem rot disease as well as appropriate management methods to control the disease. This was carried out at the Nusantara Plantation Company's 7, Unit Kiwah Rejosari-Pematang from June 2021 to January 2022. The determination of observation blocks was carried out selectively using three blocks of land attacked by Ganoderma boninense with the same criteria for the year of planting and the same soil type. Each block consists of five plots. Each plot consisted of five sub-plots, consisting of 3 oil palms for disease severity assessment and soil sampling. The soil for each subplot was composed of 15 samples, which were analyzed for physical and chemical properties of the soil. Determination of fertility status based on the soil research manual published by the Indonesian Bogor Soil Research Center with parameters from the analysis results. The limiting factor for fertility is the cation exchange capacity of the soil, which ranges from 10.07 meq/100 g to 17.68 meq/100 g, and the C-organic content, which ranges from 0.40 to 1.15%. According to chi-square analysis, this fertility-limiting factor is related to disease severity. Therefore, management needs to be done by adding organic matter to the soil, practicing organic or inorganic fertilization, and following the principles of cultivating healthy oil palm plants.

Kedelai merupakan salah satu komoditas strategis nasional. Seiring dengan pemenuhan kebutuhan kedelai maka perlu disiapkan benih yang mempunyai kualitas tinggi. Perbedaan kondisi lingkungan seperti kondisi tanah dan sistem pertanaman akan mempengaruhi kualitas benih yang dihasilkan. Penelitian ini bertujuan untuk mengetahui kualitas benih kedelai yang berasal dari penanaman pada dua jenis tanah dan sistem pertanaman yang berbeda. Penelitian dilakukan secara eksperimen dengan menggunakan Rancangan Acak Kelompok Lengkap (RAKL) faktorial yang terdiri dari dua faktor dengan 4 blok sebagai ulanganulangan.kelompok . Faktor pertama adalah sumber benih yang berasal dari dua jenis tanah yaitu gambut dan mineral. Faktor kedua merupakan benih yang berasal dari penanamnanm secara monokultur dan tumpangsari. Hasil penelitian menunjukan bahwa kandungan lemak dan protein biji kedelai yang berasal dari benih yang ditanam di lahan mineral lebih baik dibandingkan benih yang berasal dari tanah gambut. Penanaman benih kedelai di tanah gambut dapat meningkatkan kandungan serat dan karbohidrat biji serta viabilitas dan vigor benih. Penanaman secara tumpang sari meningkatkan kandungan protein dan serat benih namun tidak mempengaruhi pertumbuhan bibit.